Dust-separator for street-sweepers.



S. W. SUNDAY.

DUST SEPAHATDR FOR STREET SWEEPEIS.

APPLICATION FILED 1Au.2|.191s.

7 l 9 l 1 v p A d w m 3 P T E E H A S T E E H s 3 i nowlio'c S. W;SUNDAY.

MIST SEPARATOR [0R STREET SWEEPERS.

' APPLICATION FILED JAN-21. I916.

71,223,215. Patented Apr. 17,1917.

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S. W. SUNDAY.

nusr SEPARATOR FUR ,STREET SWEEPER APPLICATION FILED IAN. 2|, l9i6.

Swank L Gite pun;

Patented Apr. 17, 1917.

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Wilma 39w .PHom-umu WASH ma mu. m c

SAMUEL W. SUNDAY,

or worsen, KANSAS.

DUST-SEPARATOR FOR STREET-S VEEPERS.

Specification of Letters Patent.

Patented Apr. 17, 191%.

Application filed January 21, 1916. Seriai No. 73,424.

To all whom it may concern:

Be it known that I, SAMUEL V. SUNDAY, a citizen of the United States,residing at Topeka, in the county of Shawnee and State of Kansas, he reinvented new and useful Improvements in Dust-Separators for Street-Sweepers, of which the following is a spec1- fication.

This invention relates to street sweepers and it consistsof the novelfeatures hereinafter described and claimed.

An object of the invention is to provide a street sweeping machine ofsuch structure that the dirtwhich is removed from the street by .thebrush will be deposited in one hopper and the dust laden air removedfrom the dirt as it is deposited in the said receptacle and conducted toanother receptacle containing means for separating the dust from theair, the last mentioned receptacle being adapted to collect oraccumulate the dust. From the last mentioned receptacle the air isreturned to the brush thereby creating a circulation within the machineand making it practically dustless.

Another object of the invention is to provide a street sweeping machinewhich is simple of construction, easy to operate and economical tomaintain in operativecondition.

A still further object of the invention is to provide in a machine ofthe character indicated means for preventing the same from freezing incold weather and thus preventing the possibility of the parts becomingclogged during the operation ofthe machine.

In the accompanying drawings:

Figure 1 is a side elevation of the street sweeper,

Fig. 2 is a top plan view of the same with parts broken away.

Fig. 3 is a longitudinal sectional view of the same cut on the line3-3of Fig. 2.

The machine comprises a frame 1 the rear part of which is supported upontraction wheels 2.. Dirigible wheels 3 support the forward portion ofthe said frame and a suitable steering mechanism indicated in general at4; is operatively connected with the wheels 3 for directing the same.

Anengine is mounted upon the rear portion of the frame 1 and its shaft 5is journaled in suitable bearings mounted upon the said frame as bestshown in Fig. 1 of the drawing. A shaftfi is journaled for rotation ont: 1e rear portion of the frame 1. Sprocket wheels 7 are mounted uponthe shaft 6 and sprocket wheels 8 are fixed with relation to ;hetraction wheels 2. Sprocket chains 9 are trained around the sprocketwheels 7 and 8 and are adapted to transmit rotary mov .nnent from theshaft 6 to the wheels 2. Means are provided for rotating the shaft 6from the engine shaft 5 and will be now explained. A shaft 10 isjournaled for rotation in bearings mounted in advance of the said engineand upon the frame 1 and a sprocket wheel 11 is fixed to the said shaft10. A sprozket wheel-l2 is mounted on the shaft 5 ant a sprocket chain13 is trained around the sprocket wheels 11 and 12. The wheel 12 may befixed to the shaft 5 by a clutch 12. A sprocket wheel 14- best shown inFig. 2 of the drawing is mounted upon the shaft I0 and a sprocket wheel15 is mounted up on the shaft 6. A sprocket chain 16 is trainel aroundthe sprocket wheels lat and 15 anc is adapted to transmit rotarymovement irom the shaft 10 to the shaft 6. The chain 13 transmits rotarymovement from the engine shaft 5 to the shaft 10.

A receptacle 17 is mounted at the forwardportion of the frame 1 and anoperators seat 18 is mounted on the top of the said receptacle. Thereceptacle 17 is provided at its bottom with an opening which is nor-Ina-11y ClOSHl by a hinged door 19 best shown in Fig. 3 of the drawing.A casing 20 is mouni ed behind the receptacle 1'? and is inclineddownwardly and rearwardly. The upper and of the said casing communicateswith he interior of the receptacle 17 at the rear side thereof. A plate21 connects the rear portion of the upper side of the casing 20 with theframe 1 as shown in Fig. 3. A shiell 22 depends from the frame 1 at theupper rear edge of the plate 21 as shown in said figure. Verticallydisposed guides 23 depend from the sides of the frame 1 at the forwardedges of the shield 22'and heal ings 24: are movably mounted in the saidguides. Coil springs 25 hear at their upper ends against fixed parts ofthe guides 2 1 :nd at their lower ends against the upper :aces of thebearings 24 and are under tension with a tendency to normally hold, thesaid bearings 24: resiliently on the lower portions of the said guides.A shaft 26 is journaled for rotation in the bearings 24 and carries abrush 27. A sprocket wheel 28 is fixed to the shaft 26 and a stub shaft29 is journaled in suitable bearings mounted upon the frame 1. Asprocket wheel 30 is mounted upon the said stub shaft and a sprocketchain 31 is trained around the wheels 28 and 30. A gear wheel 32 isfixed upon the stub shaft 29 and meshes with a gear wheel 33 looselymounted on the shaft 10. A clutch member 34 is slidably mounted upon theshaft 10 but is constrained to rotate in unison with. the same and isengageable with the side of the gear wheel 33 whereby the said gearwheel 33 may be caused to rotate with the shaft 10. A rod 35 is movablymounted in bearings provided upon frame 1 and carries an arm 36 whichengages the clutch member 34 and is adapted to move the said clutchmember upon the shaft 9 as the rod 35 is moved. A bell crank lever 37 isfulcrumed upon the frame 1 and one end thereof is pivotally connectedwith one end of the rod The other end of the bell crank lever 37 ispivotally connected with a rod 38 which extends longitudinally of theframe 1 and which is pivotally connected at its forward end with a lever39 fulcrumed upon the machine in the vicinity of the operators seat 18.It is ap parent that by swinging the lever 39 the rod 38 will be movedlongitudinally whereby the bell crank lever 37 will be actuated andhence the rod 35 may be moved longitudinally to engage or disengage theclutch member 34 with the gear wheel 33. When the clutch member 34 is inengagement with the gear wheel 33 the said gear wheel rotates in unisonwith the shaft 10 whereby rotary movement is transmitted through thegear wheel 32 to the stub shaft 29 and through the chain 31 to the shaft26 whereby the said shaft and the brush 27 carried thereby are rotated.It will be observed that the arrangement of the parts is such that thebrush 27 rotates in a counter clockwise direction as the machine movesin a forward direction over the surface of a.

street pavement.

Bell cranks are mounted upon the end portions of a shaft 41 which isturnably permost end of one of the bell cranks 40' and is extendedlongitudinally of the frame 1. The forward end of the rod 43 ispivotally connected with a lever 44 fulcrumed at the forward portion ofthe machine within convenient reach of one occupying the the surface ofthe street or roadway. When the lever 44 is permitted to swing in aforward direction the links 42 and the springs 25 push the bearings 24in a downward direction whereby the shaft 26 and brush 27 areresiliently held in their lowered positions.

A shaft 45 is journaled for rotation at the upper end of the casing 20and a sprocket wheel 46 is mounted upon the end of the said shaft. Asprocket wheel 47 is mounted upon the shaft 10 and a sprocket chain 48is trained around the sprocket wheels 46 and 47 and is adapted totransmit rotar movement from the shaft 10 to the sha t 45. A roller 49is mounted upon the shaft 45 and is located within the upper end of thecasing 20. Arms 50 (one of which is shown in Fig. 1) are pivotallyconnected at their upper ends with the shaft 45 and a roller 51 isjournaled between the lower ends of the said arms. The said roller 51 isprovided at its ends with wheels 52 which are adapted to travel upon thesurface of the street or roadway when the arms 50 are at their lowermostposition. A plate 53 is supported upon the shaft of the roller 51 and islocated in advance of the lower forward portion of the brush 27. A belt54 is trained around the rollers 49 and 51 and is provided upon itsouter side with slats 55. Therefore it will be seen that as the roller49 is rotated the belt 54 is moved longitudinally in the casings 20 andthe upper run of thesaid belt moves in an upward direction. As the brush27 encounters the loose material at the surface of the street or roadwayit is swept up along the plate 53 and deposited upon the upper run-ofthe belt 54 which carries it up and casts it into the receptacle 17.Links 56 are pivotally connected at their lower ends with the shaft ofthe roller 51 and their upper ends are pivotally connected with thelower arms of the bell cranks 40 at the same point at which theupperends of the links 42 are connected with the said bell cranks. When thelower arms of the bell cranks 40 are swung in an upward direction ashereinbefore described the links 56 will raise the wheels 52 above thesurface of the street or roadway, consequently the said wheels areraised or lowered at the same time that the brush 27 is raised or'lowered.

A hood 57 is pivotally connected with the upper rear portion of thereceptacle 17 and its rear end normally lies over a receptacle 58mounted on the frame 1 behind the receptacle 17 The rear portion of thehood 57 normally incloses a fan 59 and the discharge outlet 60 of thesaid fan 59 is located in the receptacle 58. Baffle plates 61 and 62 arelocated in the upper portion of the receptacle 58. opposite the outlet60. The plate 61 is imperforate while the plate shield 22.

sweepingsare engaged by the brush 27 and cast up along the plate 53 uponthe upper between the plate 61 and the outlet 60. A

plate 63 is mounted in the lower portion of the receptacle 58 and theintermediate part of theplate63 is spaced from the bottom of the saidreceptacle as best shown in Fig. 3 0i the drawing. A water tank 64 islocated behind the receptacle 8 and in ad vanceof the engine and theexhaust pipe 65 from" the engine passes through the upperwportion-of thetank 64 and then extends through the lower part of the rear side of thereceptacle '58 and terminates under the plate 63. A pipe 66 leads fromthe upper ];r(:)rtion of the receptacle from a point in advance of theplate 61 and extends down through the plate 63 and the bottom of thereceptacle 58 and terminates at its lower end at the rear portion of thebrush 27 and in front of the intermediate portion of the y A pump 67 ismounted adjacent the tank 6i and its rotor is mounted upon the shaftwhich passes through the casing of the said gpump. A pipe 68 isconnected at one end with the lower portion of the tank 6etand at itsother end with the lower portion of the casing of the pump 67. The pipe68 is provided with a valve 69. A pipe 7 O is connected at one end withthe upper portion of the casing of the pump 67 and the other end of thesaid pipe 70 is located in the receptacle 58 'just in advance of thedischarge outlet that part of the said pipe which is in t e upperportion of the tank 64, suflicient heat is given off to prevent thewater contained within the said tank from freezing. From the exhaustpipe the exhaust gases are disch ged into the lower portion of thereceptdcle 58 below the plate 63 and thus the heat from the exhaustgases prevents the contents of the said receptacle 58 from freezing.Furthermore the heat from the exhaust gases will serve to dry thematerial which is deposited within the receptacle '58 as is hereinafterexplained. {During the operation of the sweeper the i run of the belt54. The belt 54 carries the said material up into the receptacle 17 andthe heavier particles gravitate into the lower portion of thereceptacle. At the same time thefan 59 is in operation and the dustladen air is drawn. fromthe upper portion of the receptacle 17 throughthe hood 57 and into the fan. This dust laden air is discharged whichmight esca} e the spray of water from air the particles (15 dust aredampened and w some of the watel issprayed upon" the per-* forated plate62. Those particles of dust the end of the pipe will comein contact withthe water which is deposited upon the plate 62 and theiefore the saiddampened particles of dust will gravitate down and deposit upon theplate 63 of the lower portion of'the receptacle 58. As hereinbeforeexplained the he: ted gases which are exhausted from the engine throughthe pipe 65 will prevent tie material in the lower portion ofthe reeptacle 58, from freezing and the heat fronithe said gases will alsoserve as a means for drying theflmaterial' which is'depositec' upon theplate 63. The air which is admit ted into the receptacle 58 asdescribed, is pe mitted to pass therefrom. through-the pipe 66 and isdischargedin ad- Vance of the intermediate portion'of the shield 22 andimm ediately-behind the brush 27 and thus should any particles of dust v9 66 they will be caught up by the brush and I again passedthror ghthesweeper along the follow the air whi h passes through the pipe coursejust described.

From the foregoing description takenin I conjunction with ;heaccompanying draw ings it will be seen that a street sweeping machine ofsimple and durable structure is provided and that the same is capable ofseparating the di [st laden air from the heavier material constitutingthe sweepings tacle and furthermore means are provided a for preventingthe agent which servesto precipitate the dust from freezing in the ma;chine and also the exhaust from the engine is utilized for the urpose ofpreventing the agent, which in this instance is water, from freezing inthe tank which isemployed for holding the same I reparatory to its useforfns sprinkling in the dust receptacle to precipitate the dust. a

It is to be unders' 00d that various changes in form, proporticn andminor details of construction may le resorted to within the scope of theinven1 ion as claimed and that the structure may l e varied within thelimits stated. I i

Having described the inventionwhat is claimed is:

In a machine of the character described a receptacle, meansfordepositing material in the receptacle, a fan for drawing dust 9 ladenair from the receptacle, a second receptacle which rece .ves thedischarge eutlet water comes in c( ntact with the dustladen I and thatthe said lust laden air is relieved I of the dust which is collected intherecepf of the fan, a perforated plate located in the t ionedreceptacle and under the last men- 13 last mentioned receptacle oppositethe distloned plate.

charge outlet of the fan, means for dis- In testimony whereof I aflix mysignature chargilng water into tthe last llllflltontfii rein presence oftwo witnesses. 5 ceptac e at a point etween t e isc arge outlet of thefan and the perforated plate, SAMUEL SUNDAY a plate located in the lowerportion of the Witnesses: last mentioned receptacle and means for dis-PEARL HOLDEN, charging a heating agent into the last men- LYMAN E.MALONE.

copies of thin potent may be obtained for live cent! each, by I-ddreuingthe Commissioner of Patents, Washington, D. 0."

